diff options
Diffstat (limited to 'cli_args.go')
| -rw-r--r-- | cli_args.go | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/cli_args.go b/cli_args.go index f1cefb4..cae7723 100644 --- a/cli_args.go +++ b/cli_args.go @@ -50,6 +50,8 @@ type argContainer struct { _ctlsockFd net.Listener // _forceOwner is, if non-nil, a parsed, validated Owner (as opposed to the string above) _forceOwner *fuse.Owner + // _explicitScryptn is true then the user passed "-scryptn=xyz" + _explicitScryptn bool } type multipleStrings []string @@ -205,7 +207,8 @@ func parseCliOpts() (args argContainer) { flagSet.IntVar(&args.notifypid, "notifypid", 0, "Send USR1 to the specified process after "+ "successful mount - used internally for daemonization") - flagSet.IntVar(&args.scryptn, "scryptn", configfile.ScryptDefaultLogN, "scrypt cost parameter logN. Possible values: 10-28. "+ + const scryptn = "scryptn" + flagSet.IntVar(&args.scryptn, scryptn, configfile.ScryptDefaultLogN, "scrypt cost parameter logN. Possible values: 10-28. "+ "A lower value speeds up mounting and reduces its memory needs, but makes the password susceptible to brute-force attacks") flagSet.DurationVar(&args.idle, "i", 0, "Alias for -idle") @@ -227,6 +230,10 @@ func parseCliOpts() (args argContainer) { tlog.Fatal.Printf("Invalid command line: %s. Try '%s -help'.", prettyArgs(), tlog.ProgramName) os.Exit(exitcodes.Usage) } + // We want to know if -scryptn was passed explicitely + if isFlagPassed(flagSet, scryptn) { + args._explicitScryptn = true + } // "-openssl" needs some post-processing if opensslAuto == "auto" { args.openssl = prefer_openssl.PreferOpenSSL() @@ -311,3 +318,15 @@ func countOpFlags(args *argContainer) int { } return count } + +// isFlagPassed finds out if the flag was explictely passed on the command line. +// https://stackoverflow.com/a/54747682/1380267 +func isFlagPassed(flagSet *flag.FlagSet, name string) bool { + found := false + flagSet.Visit(func(f *flag.Flag) { + if f.Name == name { + found = true + } + }) + return found +} |